Clarify the formation process of white spotted wet snow
| Project/Area Number |
15K13528
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
Kameda Takao 北見工業大学, 工学部, 教授 (00233974)
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| Co-Investigator(Kenkyū-buntansha) |
原田 康浩 北見工業大学, 工学部, 准教授 (80198928)
小澤 久 広島大学, 総合科学研究科, 准教授 (30371743)
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| Co-Investigator(Renkei-kenkyūsha) |
Nohguchi Takaaki 国立研究開発法人防災科学技術研究所, アウトリーチ・国際研究推進センター, 契約専門員 (50360368)
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| Research Collaborator |
Murai Akio
Fujino Takeshi
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 斑点ぬれ雪 / 生成メカニズム / 濡れ雪 / 水飽和した濡れ雪 / 白い斑点 / 白い斑点模様 / 形成過程の解明 / 白い気泡 / ぬれ雪 / 積雪 |
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| Outline of Final Research Achievements |
Observations using interval cameras on white spotted wet snow have been extensively carried out at Kitami (Hokkaido pref.), Niigata (Niigata pref.) and Kanazawa (Ishikawa pref.) in Japan from 2015/16 to 2017/18 winter seasons. We also examine the formation process of white spots on wet snow surface using elastic deformation theory.
We found that large air bubbles of 1 cm diameter in soaked wet snow was formed from small air bubbles of about 1mm diameter within a few minutes. The large air bubbles float in snow layer, and the air bubbles move horizontally at 1 to 3 cm during the formation process of the large air bubbles. According to the elastic deformation theory, the distance between the large air bubbles is proportional to the power of 3/4 of the thickness of soaked snow layer, 1/4 of Young’s modules of the snow layer and -1/4 of acceleration of gravity.
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Report
(4 results)
Research Products
(9 results)
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[Book] 雪氷学2017
Author(s)
亀田貴雄，高橋修平
Total Pages
349
Publisher
古今書院
ISBN
9784772241946
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